FM31272 View Datasheet(PDF) - Ramtron International Corporation
Part Name
Description
MFG CO.
'FM31272' PDF : 26 Pages View PDF
FM31278/276/274/272 - 5V I2C Companion
Supervisor Timing (TA = -40° C to + 85° C, VDD = 4.0V to 5.5V)
Symbol
Parameter
Min
tRPU
/RST Active (low) after VDD>VTP
100
tRNR
VDD < VTP noise immunity
10
tVR
VDD Rise Time
50
tVF
VDD Fall Time
100
tWDP
Pulse Width of /RST for Watchdog Reset
100
tWDOG
Timeout of Watchdog
tDOG
fCNT
Frequency of Event Counters
0
Notes
1 This parameter is characterized but not tested.
2 Slope measured at any point on VDD waveform.
3 tDOG is the programmed time in register 0Ah, VDD > VTP and tRPU satisfied.
Max
200
25
-
-
200
2*tDOG
10
Units
ms
µs
µs/V
µs/V
ms
ms
MHz
Notes
1
1,2
1,2
3
/RST Timing
VDD
VTP
VRST
t
RNR
t
RPU
RST
Rev. 2.0
Dec. 2007
Page 22 of 25
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